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Sorry for the naive question, but I got stuck while following all the pieces of tutorials available. So, is there a way to populate a Database db from a simple List rather than loading it reading a file?

Basically what I'm looking for is something similar to:

List objects = ...

Database db = ClassGenericsUtil.parameterizeOrAbort(ArrayDatabase.class, params, objects);

db.initialize();

Thanks in advance.

Community
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giusepperizzo
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1 Answers1

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What are the contents of your Strings? Same as understood by the ELKI parsers?

This will likely require some code modifications, because the parsers are designed around Javas InputStream. I don't suggest wrapping a List<String> into an InputStream although that would probably be the least-effort approach.

Why don't you try extending AbstractDatabaseConnection (or implementing DatabaseConnection)? The database connection format, MultipleObjectsBundle is not much more than List<Object> and relation metadata; fairly easy to construct.

Alternatively, you could use your own code to parse the Strings into double[] and then use ArrayAdapterDatabaseConnection; which will wrap the double[] as DoubleVector for you and construct the bundles.

Erich Schubert
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  • Many thanks for your advice. Following it I extended the AbstractDatabase where I used ArrayAdapterDatabaseConnection to initialize the dataset from a double[][] and everything worked fine. – giusepperizzo Nov 08 '13 at 11:43